Knife-polishing machine.



PATENTED OCT. 16, 1906.

G. S. BLAKESLEE.

KNIFE POLISHING MACHINE. APPLIOATION FILED JUNE 17, 1905.

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APBLIGATION FILED JUNE 17, 1905.

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UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Oct. 16, 1906.

Application filed June 17,1905. Serial No. 265,646.

T aZZ whom it may concern:

Be it known that I, GEORGE S. BLAKES- LEE,,3. citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Knife-Polishing Machines, of which'the following is a specification, reference being had to the accompanying drawings.

This invention relates to machines for polishing knife-blades and other similar articles.

It is common in machines of this character to provide two suitably-covered wheels or disks adapted to be rotated in opposite directions and between which the knife-blades to be polished or cleaned are drawn. T0 properly adapt the machine for cleaning blades of different thicknesses, it is desirable that the surfaces of such wheels or disks be set against each other with varying degrees of pressure; and it is one of the objects of my invention to so mount the axle of one of such wheels or disks as to permit such axle and the wheel or disk carried thereby to be readily moved toward or away from the opposite wheel or disk.

Another object is to provide an improved connection between the adjustable axle referred to and an oppositely-located axle from which power is derived for driving said adjustable axle and its wheel or disk.

A still further object of my invention is to provide covering devices for the upper portions of the polishing wheels or disks which at the same time, serve as closures for the openings through which lubricant is applied to the axles of'the wheels or disks.

These objects'I accomplish as illustrated in the accompanying drawings and as more specifically hereinafter pointed out.

That which I believe to be new will be set forth in the claims.

In the drawings, Figure 1 is a plan view of a machine embodying my improvements, the cover of one of the wheels or disks being removed. Fig. 2 is an end view. Fig.3 is a perspective view of the shaft for the adjustable wheel or disk, the oppositely-located shaft from which it is driven, and my improved connection between such shafts. Fig. 4 is a perspective view of the frame that carries the shaft of the adjustable wheel or disk.

Referring to the several figures of the drawings, in which corresponding parts are distinguished by the same reference characters, 5 indicates a base, preferably of metal, supported in the construction. shown on suitable corner-legs 6.

.7 indicates a main driving-shaft, which shaft is supported in suitable-bearings 8 9 a short distance above the base 5.

10 indicates a bevel-gear on the shaft 7, which bevel-gear isadapted to mesh with another bevel-gear 11, secured on the inner end of a short shaft 12, to which is adapted to be attacheda crank 13. By these devices the machine is adapted to be turned by hand. If it is desired to operate the machine by power, the bevel-gear 10 may be moved along the shaft 7 out of engagement with the gear 11 and power applied by means of a belt over the p ulley 15 on the projecting end of the shaft 7. 14 indicates a loose pulley on said shaft 7.

16 17 indicate a pair of polishing wheels or disks covered with any suitable facing such as is commonly employed on wheels or disks employed in cleaning or polishing. The wheel or disk 16 is fast upon the shaft 7, so as to rotate therewith.

18 indicates a frame or housing within which the two wheels or disks 16 17 are located. Such frame or housing, as shown, is considerably higher at its ends than at its central portion, such central portionbeingbelow the central or contact portions of the wheels or disks, so as to enable a knife-blade to be drawn between such wheels or disks to be thoroughly cleaned or polished thereby. Upon the upper edges of the two side walls of this lower central portion of the frame are placed blocks 19, which act as stops for the blades being cleaned to come in contact with.

20 indicates an axle upon which the wheel or disk 17 is mounted. The ends of this axle 20 are supported in bearings 21 in a frame the sides of which are each in the form of a bell-crank. These two bell-cranks of the frame are indicated by 22 and 23, 22 being the rearwardly-exte'nding portion and 23 the downwardly-extending portion. The outer ends of the portions 22 are connected by an end piece 24, which in the form of construction illustrated is integral with the other portions of the frame. This double bell-crank frameembraces the frame or housing 18 at one end, and to such frame or housing the depending arms 23 are attached by suitable pivot-bolts 25, the lower ends ofthese arms 23 being provided with holes 26, as shown in Fig. 4, to receive such pivots. The end of the frame orhousing 18 at which this-double bell-crank is attached is provided with an outwardly-extending ear 27, and directly beneath such ear when the parts are in position is another ear 28, extending out from the end bar 24 of the bell-crank-lever frame.

29 indicates a screw the squared head of which is adapted to fit in a suitable recess in the under part of the ear 28, so as to prevent the screw from turning, such screw projecting, as shown, upward through the opening 30 in the ear 28 and also through an opening in the ear 27 and being held in'place by the thumb-nut" 31 By this construction it will be seen that'by turning the thumb-nut so as to drawjthe screw 29 upward the outer end of the bell-crank-lever frame will also be pulled upward, such frame turning, of course, on its pivots 25', and the result will be to force the wheel or disk 17 toward the other wheel or disk 16, and the pressure of the one disk against the other can be regulated by means of this arrangement, as desired. As shown in Fig. 4, the hole 30 through the ear 28 is made oblong, so as to allow for the are de scribed by the outer end of the bell-crank-lever frame as it is moved.

' It is evident, of course, that in order to insure the surface of the adjustable disk 17 being brought squarely against the surface of its coacting disk the shaft 20 must be moved forward and back bodily on straight lines, and in order to accomplish this a certain degree of flexibility in the means con necting it with the shaft from which it is driven must be provided. The shaft from which it is driven is represented by 32, which latter shaft is mounted in suitable bearings 33 and has attached to it a gear that meshes with a corresponding gear on the other shaft 7. These two gears are indicated in Fig. 1 by dotted lines drawn on the gear-case 34.

As shown clearly in Fig. 3, the shafts 20 and 32 are slotted at their opposing ends, such slots being indicated, respectively, by 35 and 36. 37 indicates a connection between these two shafts 20 and 32, such connection being a flat piece of metal bent and having its ends projecting into the slots 35 and 36, the bending of this metal connection being such as will cause said slots to be" arranged at right angles to each other. The connection is secured at its ends within these slots by small pivots 38 39, respectively, upon which pivots the connection is free to turn within the limits permitted by the space between the end of the connection and the end of the slot, at small space being left, as clearly shown in said Fig. 3, between the inner end of each slot and one of the ends of the connection. By this construction sufficient flexibility is provided between the two shafts 20 and 32 to permit of the desired adjustment of the wheel or disk 17 in a proper manner without in any way impairin the rotatability of said shaft 20 and the whee or disk secured thereon.

Rising above the bearings of the shafts 7 and 20 at opposite sides of the two wheels or disks are short hollow studs 40, through which lubricant can be fed to the interior of the bearings, as desired. It is desirable, of course, that the ends of these studs be closed to prevent the admission of dust, &c., to the bearings, and it is also desirable that the greater portion of the wheels or disks be covered, and by my construction I provide with one device a covering for each wheel and for each pair of hollow studs at the sides of each wheel. This cover for each wheel is indicated by 41, and, as shown, its lower edge is shaped to conform to the curved edgesof the side walls of the frame or housing 18, and at its inner edge such cover is provided with laterally-extending horizontal ears 42, that rest u on the u per ends of the hollow studs 40. uch stu s therefore afford a support to the inner ends of the cover and these lateral ears 42 form effectual closures for the openings of the studs.

That which I claim is new, and desire to secure by Letters Patent, is

1. The combination with two shafts arranged substantially in alinement and each provided with a slot in one end, the two shafts being arranged to present the slots at substantially right angles to each other, of a connection between said shafts, said connection extending into said slots, and pivots for uniting said connection and shafts, substantially as s ecified.

2. The combination with two shafts arranged substantially in alinement and each provided with a slot-in one end, the two shafts being arranged to present the slots at substantially right angles to each other, of a twisted bar connecting said shafts, said bar having its ends extending into said slots and held in place by pivots, substantially as specified.

3. The combination with a shaft, a wheel mounted thereon, bearings on opposite sides of said wheel for said shaft, and hollow' studs rising from said bearings, through which studs lubricant is adapted to be fed, of a removable cover for said Wheel, said cover being adapted to be supported on and act as a closure for said hollow studs, substantially as specified.

4.' The combination with a shaft, a wheel mounted thereon, bearings on opposite sides of said wheel for said shaft, and hollow studs rising from said bearings, through which studs lubricant is adapted to be fed, of a removable cover for said wheel, said cover having laterally-extending ears adapted to rest upon and act as a closure for said hollow studs, substantially as specified.

GEORGE S. BLAKESLEE.

Witnesses: MINNIE A. HUNTER, ALBERT H. ADAMS.

ICO 

